UNIT WITH POWER CIRCUIT MOUNTED THEREIN, AND MOTOR DRIVE APPARATUS

摘要

A first power module, a second power module and a detecting circuit are mounted on a printed board. On the surface of each power module, a heat sink is attached. In a space between the mounting portion of the detecting circuit on the printed board and a base section of the heat sink, an electromagnetic wave blocking material is arranged for blocking electromagnetic waves traveling from the heat sink side toward the detecting circuit side.